Research on Methods of Sheet Blank Shape Optimization for Drawing of Complex Special-Shaped Boxes

2011 ◽  
Vol 399-401 ◽  
pp. 1826-1831
Author(s):  
Wei Xia ◽  
Huan Yang ◽  
Jian Min Zeng
Keyword(s):  
Finite Element ◽  
Material Flow ◽  
3D Models ◽  
Drawing Process ◽  
Forming Quality ◽  
Finite Element Software ◽  
Blank Shape Optimization ◽  
Blank Shape ◽  
The Given

The reasonable blank shape is very important for drawing forming quality of sheet. In this paper, the blank shape is obtained by inverse calculation based on final drawing workpiece, with finite element software. The optimal blank contour is determined by modifying the 3D models of final drawing workpiece and comparing with forming quality of the different inverse calculated blank shapes, according to the stress and the material flow law in drawing process. The results show that, in the case of the given shapes of workpiece, the blank shapes with high precision can be obtained, the formability becomes better, and the number of drawing forming can be reduced by using the method. The method may also contribute to the drawing of large and medium-sized panels, rectangular boxes and special-shaped parts.

Blank shape optimization in the deep drawing process by sun method

2021 ◽  
Author(s):  
Hamidreza Gharehchahi ◽  
Mohammad Javad Kazemzadeh-Parsi ◽  
Ahmad Afsari ◽  
Mehrdad Mohammadi
Keyword(s):  
Shape Optimization ◽  
Deep Drawing ◽  
Drawing Process ◽  
Deep Drawing Process ◽  
Blank Shape Optimization ◽  
Blank Shape

Numerical Simulation and Parameter Optimization on Forming Process of Automobile Torque Box

2014 ◽  
Vol 722 ◽  
pp. 140-146
Author(s):  
Wen Juan Zhang ◽  
Long Wu ◽  
Gang Chen
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Parameter Optimization ◽  
Process Parameters ◽  
Fem Simulation ◽  
Simulation Software ◽  
Drawing Process ◽  
Forming Process ◽  
Element Simulation

In this paper the drawing process of Box-torque was simulated by Dynaform, which is FEM simulation software. The process parameters, which affected the quality of forming, were optimized by finite element simulation. The emphasis was focus on the optimization of draw-bead and BHF and data were summarized from the optimization graphs. In this simulation, lengthways draw-bead was set on the technical face for reducing or eliminating wrinkle. It was innovation difference from the usual that the draw-bead was set on binder. Finally the correctness of simulation was approved by comparing the optimization of simulation with the data of experimentation.

Blank Shape Optimization in Deep Drawing with Combined Restraint

2013 ◽  
Vol 371 ◽  
pp. 178-182
Author(s):  
Viorel Paunoiu ◽  
Virgil Teodor
Keyword(s):  
Numerical Simulation ◽  
Deep Drawing ◽  
Degree Of Deformation ◽  
Initial Blank ◽  
Mathematical Relation ◽  
Blank Shape Optimization ◽  
Cylindrical Parts ◽  
Blank Shape ◽  
High Degree

One of the methods for increasing the degree of deformation in the deep drawing of the cylindrical parts is the method with the combined restraint. In this process, due to the high degree of deformation, the earing is pronounced and affects the quality of the final part. The paper focuses in optimization the blank shape in this process applying a method which combines a mathematical relation with the results of the numerical simulation. The mathematical relation connects the radii of the initial blank at the different angles with the sizes of the part heights at different angles. The numerical simulation using FEM was used for the heights determination at the main anisotropy directions considering different initial blank dimensions. An experimental work was done for certify the numerical results. The results confirmed that the optimization of the blank shape in deep drawing with the combined restraint is a key for improving the deformation process, for reduction the earing and for minimizing the material consumption.

Effective Compactible Time of Asphalt Pavement

2011 ◽  
Vol 255-260 ◽  
pp. 3156-3160 ◽  
Author(s):  
Ying Gao ◽  
Ren Xiao Wang ◽  
Wen Bin Yu
Keyword(s):  
Finite Element ◽  
Solar Radiation ◽  
Air Temperature ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Great Influence ◽  
Cooling Curve ◽  
Cooling Curves ◽  
Finite Element Software

The quality of compaction is important to Hot Mixed Asphalt (HMA) pavement. Most premature failures of asphalt pavement are concerned with poor compaction. Characteristics of cooling curve of asphalt mixture were studied in this paper. Through on site measurement, it was found that air temperature, solar radiation, wind velocity and layer thickness had great influence on cooling time. Then, with ABAQUS finite element software, the rule of HMA mixture cooling curves during paving was simulated. A simple multi-factors regression equation was given which can be used to estimate the effective compactible time.

Research on CNG Control Bottle Drawing Process and Model Parameters

2012 ◽  
Vol 271-272 ◽  
pp. 466-471
Author(s):  
Hai Bin Hao ◽  
Chang Cai Zhao
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Model Parameters ◽  
Drawing Process ◽  
Drawing Force ◽  
Energy Problem ◽  
Entrance Angle ◽  
Finite Element Software ◽  
Finite Element Numerical Simulation ◽  
Parameter Values

Since the energy problem is more and more serious, the CNG cylinders are used more and more widely. Meanwhile, more and more attention has been paid to the manufacturing and research and development of CNG cylinders. Based on the CNG cylinder drawing process, finite element software is adopted to research the parameters of drawing circle during the drawing process to find the optimum die-entrance angle and optimum die radius under minimum drawing force. Meanwhile, a contrastive research is done to the drawing forces with different different drawing ratios and different friction coefficients. Design parameter values of drawing circle are determined through the finite element numerical simulation to give guidance to actual production.

Digital Design of the Ocean Casing Pipes Centering Equipment

2009 ◽  
Vol 419-420 ◽  
pp. 673-676
Author(s):  
Xiao Dong Xing ◽  
Li Xun Zhang ◽  
Li Quan Wang ◽  
Jun Liu
Keyword(s):  
Finite Element ◽  
Element Model ◽  
3D Models ◽  
Digital Design ◽  
Design Stage ◽  
Element Analysis ◽  
Butt Welding ◽  
Finite Element Software ◽  
Digital Modelling ◽  
Strength And Stiffness

An Ocean Casing Pipes Centering Equipment is designed and implemented. Utilizing the equipment, two casing pipes can be fastened together by means of welding. The equipment can automatically carry out clamping and centering two casing pipes, and then the butt welding is conducted at their adjacent ends. In the development of this equipment, some advanced means, such as digital modelling and FEA (Finite Element Analysis), are taken full advantage of. First, all the parts’ 3D models are built with Pro/Engineer. Then, those digital parts is assembled in Pro/E assembly environments. Meanwhile, assembly interference detection is executed. Furthermore, by means of universal finite-element software，the finite element model is constructed. The strength and stiffness of the structure is calculated and analyzed so that the faults of the equipment can be found out in design stage. Through repeating this designing and verifying course, the structure of the equipment can be improved.

Blank Optimization in Elliptical-Shape Sheet Metal Forming Using Response Surface Model Coupled with Reduced Basis Technique and Finite Element Analysis

2011 ◽  
Vol 473 ◽  
pp. 683-690 ◽  
Author(s):  
Khalil Khalili ◽  
Parviz Kahhal ◽  
Ehsan Eftekhari Shari ◽  
M. Soheil Khalili
Keyword(s):  
Finite Element ◽  
Sheet Metal Forming ◽  
Deep Drawing ◽  
Metal Forming ◽  
Shape Design ◽  
Drawing Process ◽  
Reduced Basis ◽  
Element Analysis ◽  
Design Variables ◽  
Blank Shape

The present study aims to determine the optimum blank shape design for the deep drawing of Elliptical-shape cups with a uniform trimming allowance at the flange i.e. cups without ears. This earing defect is caused by planar anisotropy in the sheet and the friction between the blank and punch/die. In this research, a new method for optimum blank shape design using finite element analysis has been proposed. Present study describes the approach of applying Response Surface Methodology (RSM) with Reduced Basis Technique (RBT) to assist engineers in the blank optimization in sheet metal forming. The primary objective of the method is to reduce the enormous number of design variables required to define the blank shape. RBT is a weighted combination of several basis shapes. The aim of the method is to find the best combination using the weights for each blank shape as the design variables. A multi-level design process is developed to find suitable basis shapes or trial shapes at each level that can be used in the reduced basis technique. Each level is treated as a separated optimization problem until the required objective – minimum earing function – is achieved. The experimental design of RSM method is used to build the approximation model and to perform optimization. MATLAB software has been used for building RSM model. Explicit non-linear finite element (FE) Code Abaqus/CAE is used to simulate the deep drawing process. FE models are constructed incorporating the exact physical conditions of the process such as tooling design like die profile radius, punch corner radius, etc., material used, coefficient of friction, punch speed and blank holder force. The material used for the analysis is Stainless steel St12. A quantitative earing function is defined to measure the amount of earing and to compare the deformed shape and target shape set for each stage of the analysis. The cycle is repeated until the converged results are achieved. This iterative design process leads to optimal blank shape. So through the investigation the proposed method of optimal blank design is found to be very effective in the deep drawing process and can be further applied to other stamping applications.

Curve Cutting ZrO2 Ceramic and Cooling Lower Surface Cutting Silicon Wafer with Laser Induced Thermal-Crack Propagation

2014 ◽  
Vol 711 ◽  
pp. 222-226
Author(s):  
Chun Yang Zhao ◽  
Hong Zhi Zhang ◽  
Li Jun Yang ◽  
Yang Wang
Keyword(s):  
Finite Element ◽  
Crack Propagation ◽  
Silicon Wafer ◽  
Fracture Mechanism ◽  
Brittle Materials ◽  
Lower Surface ◽  
Thermal Crack ◽  
Surface Absorption ◽  
Finite Element Software

In laser induced thermal crack propagation (LITP) cutting brittle materials, according to the laser absorption ability, materials are divided into the body absorption and surface absorption. This paper indicates the fracture mechanism of LITP cutting surface absorption brittle materials. The crack extension appears in the lower surface firstly in this stress distribution state, then the crack extends to the upper surface and the laser scanning direction with the LITP cutting. The stress field of cutting ZrO2 ceramic is studied by finite element software ANSYS. The crack propagation process of cutting silicon wafer is studied by finite element software ABAQUS. According to the fracture mechanism, the curve cutting the ZrO2 ceramic experiments and the cooling lower surface cutting the silicon wafer experiments are carried out in this paper. Optical microscope and laser scan confocal microscope (LSCM) photographs of the curve path the ZrO2 ceramic and separation surface cutting the silicon wafer are obtained to examine the cutting quality. The quality of the curve path is very good. The quality of the separation surface in cutting the silicon wafer with the cooling lower surface is better than conventional environment.

Optimization of Initial Blank Shape to Minimize Defects in an A Pillar Inner Panel Using Finite Element Method

2012 ◽  
Vol 538-541 ◽  
pp. 1045-1048
Author(s):  
L.M. Li
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Numerical Model ◽  
Material Flow ◽  
Numerical Results ◽  
Fe Method ◽  
The Real ◽  
Final Configuration ◽  
Stamping Process ◽  
Blank Shape

Wrinkling and cracking are two major problems of the automobile inner panel. In this study, the stamping process of an A pillar inner panel is studied with the finite element (FE) method, aimed at avoiding drawbacks due to wrinkling and cracking. The established numerical model is proved accurate by comparing the numerical final configuration to the real part. Then the material flow of the blank is analyzed. It is concluded that blocking of material flow is the main reason for those two pathologies. Thus, a gap design is suggested to minimize the concerned defects. According to the numerical results, after optimizing, the inner panel is free from formability problems.

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